How to add general extensions to a custom Collection in Firefox for Android Nightly?

[DaveRo]

I just tried editing my collection in Android/Nightly and the search only finds recommended addons. That’s a change - and, I think, a bug.

Can you edit the collection on Desktop?

( I previously found that an addon that was only for Android could only be added on Android:

Add-on support in new Firefox for Android

@caitlin Thanks for that, and to the devs. I have installed my Mudcat addon in Nightly. I wanted to install this but I can’t add it to my collection: https://addons.mozilla.org/en-GB/android/addon/android_new_tabs_in_foreground ‘Find an addon to include in this collection’ doesn’t find it. Paradoxically I suspect that’s because it’s in AMO as an Android addon - not available for the desktop platform. I suspect that’s unintentional.

so this change would make such an addon impossible to add.)